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# Title: [Johannis Wallisii SS. Th. D. Geometriae Professoris Saviliani Oxoniae, Tractatus Duo] Johannis Wallisii SS. Th. D. Geometriæ Professoris Saviliani Oxoniæ, Tractatus Duo (shelfmark Leibn. Marg. 103)
# Folio 12, page id 85138403X:0028
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DE
CACLDLDE.
Datur irem sCOeNtI C Z Y CeNErUI GPAVIEATIS (UE 523, Gin
POnItuT, _ 567. 80. deinceps oltendetur;) adeoque e ipsius
dictancia ab aequilibrii linea C F: ElIO CaE. LFIELLAGUO, PTOPTeF
a
B
 Dictancia ceneri gravicaris seomenti C L X ab
eadem C F recta, ad distantia E, uE y ad B. (Nempe in ratione
QUX COIMPONLEUL EX PATIOHE MOIEHEOTUI, a Ad B; AIque reCIPIOCA
magnicudinum, r ad a.) pur 
38. Similicer momencum seomenti C Z. Y Ad MOIeHEUL
seomenti C2 T, respectu linex 2. Y, est uc solidum iltius ad
Folidum hujus corvertione circa recta Z Y. FaCtum. Sed haec
ratio superius daca el, per 528; Ergo _ illa. FAo uc a ad s.
Moonicudinum aurem ratio (uE PriUS) uc a 2d 7. Diltancia vero
centri gravicaris seomenti C2 Y a recta Z Y, (ICG. Fric di-
stincia ceneri gravieacis segmenci CZ. V ad distanciam 5, uF Z
ad s. Nempe 2G
39. Cum ieaque daca sic istius diltanciarum a recta C F, tum
d recta Z Y, (acque inera ipsum segmentum esse conster,) datur
_ ipsum GraVIEatIS cenEruM guXTIEUM.
Centrum (o- 40. Deinde, ad inveniendum centrum gravicaris in Polidis;
Supponimus ur supra in segmeneis circularibus, ita jam in sphae-
ralibus segmentis cenerum grariearis dacum esse: vel, h exiga-
Eur, Parari Cumus exhibere, uc intra 567 E se99.
42. Ponamus jam solidum factum ex convertione semiereloi-
dis C A F circa rectam A F, secari plano quod plano C A F
recte insistae in A F recta, semisolidum abscindens; cujus
propterea centrum graviratis in plano C A F esse manifectum
eAt.
42. Deinde, cum solidum sive ex convertione, sive ex semi-
COnvertiOne Traperii V BDP (cIrCA reCtAM A F,) ad solidum
ex limili convertione vel semiconreriione crionouli v LP, lIL uE
dd 2, (uc S 24 Ostentum est;) quaerantur urriusque centra gravica
ris, ut habeacur rario distanciarum cum a recta AF tum a recta
F
43. Hlabetur aucem solidi ex semiconrertione Triperii Cenerum
raricacis, si in recta C. J. incellisatur punctu K abscindere rectam
lidi circa